Niantic and The Pokémon Company are continuing to promote the Pokémon GO Championship Series:
Charged Attack Timing | Play! Pokémon Spotlight
How to Get Started in PVP | Play! Pokémon Spotlight
Purified vs Shadow Damage | Play! Pokémon Spotlight
How to Read Teams | Play! Pokémon Spotlight
Please be aware of your surroundings and follow guidelines from local health authorities when playing Pokémon GO. Upcoming events are subject to change. Be sure to follow Niantic on social media, opt in to receiving push notifications, and subscribe to Niantic’s emails to stay updated. For the latest on in-game events and feature updates, be sure to check this help center article.
Source: Official Pokémon GO blog